See which live weather programs work with MSFS, X-Plane, FSX and Prepar3D, plus version checks, console limits and conflict fixes.
Live weather works through built-in systems in Microsoft Flight Simulator 2020/2024, X-Plane 12 and FlightGear, or external engines such as ActiveSky, REX weather products, xEnviro and FSrealWX. Compatibility is version-specific: no single program supports every simulator, and only one weather injector should control a flight at a time.
Which live weather program works with my simulator?
The right live weather program depends on the simulator, its major version and the platform on which it is running.
| Simulator | Compatible live weather choices | Main caveat |
|---|---|---|
| Microsoft Flight Simulator 2024 | Built-in Live Weather; external engines whose documentation explicitly lists MSFS 2024 | Do not assume an MSFS 2020 utility supports MSFS 2024. Windows companion programs cannot run on Xbox or PlayStation 5. |
| Microsoft Flight Simulator 2020 | Built-in Live Weather, ActiveSky FS and REX Weather Force 2020 | External engines are principally PC tools and may use different injection methods from the simulator's native weather. |
| X-Plane 12 | Built-in real weather, ActiveSky XP 12 and compatible xEnviro builds | The product build must explicitly support X-Plane 12; an X-Plane 11 plug-in is not automatically compatible. |
| X-Plane 11 | Built-in real weather, Active Sky XP and xEnviro | Check the operating-system and X-Plane build requirements before installing an older plug-in. |
| Prepar3D | ActiveSky editions made for the relevant P3D version, REX Sky Force 3D and compatible FSrealWX builds | Prepar3D major versions are not interchangeable. The weather engine may require its own connector or matching SimConnect components. |
| FSX | Active Sky 2016, Active Sky Next, REX Sky Force 3D and FSrealWX | FSX's original online weather service is no longer a dependable option, so an external engine is normally required. |
| FS2004 | FSrealWX and legacy ActiveSky editions | Old software may fail because its weather source, security protocol or licence system has stopped working. |
| FlightGear | Integrated real-weather fetching | A separate weather program is usually unnecessary. |
For Microsoft Flight Simulator 2020, our comparison of built-in weather, ActiveSky FS and REX Weather Force explains where each option is strongest. MSFS 2024 users must check for an explicit 2024 compatibility statement rather than relying on similar product names.
X-Plane 12 already includes global real weather, so try the native system before buying or installing another engine. We cover the relevant controls in our X-Plane 12 real-weather setup instructions.
Are weather engines and cloud add-ons the same thing?
A weather engine obtains observations and forecast data, interprets them and supplies weather to the simulator; a visual add-on may only replace cloud textures, lighting or atmospheric effects.
Some packages combine both functions, but many do not. Look for explicit references to live weather, METAR downloads, upper-air forecasts or weather injection. A collection of cloud textures or presets alone cannot follow real-world conditions.
Which option should I choose?
Use the simulator's built-in weather first when it provides global coverage and satisfactory results; choose an external engine when you need features its native system lacks.
- Built-in weather: the simplest choice for MSFS 2020, MSFS 2024, X-Plane 12 and FlightGear. It normally integrates most closely with the simulator's cloud, visibility and atmospheric systems.
- ActiveSky: suited to a supported PC simulator when you want a dedicated briefing interface, weather control, smoothing or historical-weather functions offered by that particular edition.
- REX weather products: useful when the matching edition offers the alternative weather injection or visual package you want. Weather Force 2020 and Sky Force 3D are different products for different simulator families.
- xEnviro: an X-Plane-specific option combining weather generation with atmospheric rendering. Confirm support for the exact X-Plane major version.
- FSrealWX: primarily relevant to older simulators. Test that its data feed and simulator connection still work before depending on it.
For FSX, see our explanation of external weather engines and FSX compatibility requirements. Prepar3D users should follow the separate Prepar3D injector and SimConnect setup checks, because a connector built for another P3D release can appear to connect while failing to inject weather correctly.
How do I prevent two weather programs from conflicting?
Run one active weather injector and disable every competing source for that flight.
- Verify compatibility: match the program to the exact simulator, major version, operating system and platform. PC companion applications do not run directly on Xbox or PlayStation.
- Install the required connector: older simulators commonly use SimConnect, while X-Plane products normally install a plug-in. Use only the connector supplied for that simulator version.
- Select one weather source: if an external engine is injecting weather, disable the simulator's own live-weather updates unless the engine's instructions specifically say otherwise.
- Match the time mode: live weather normally follows real-world UTC. If the simulator is set to another date, use historical weather only when the selected engine supports it.
- Check the result: compare the engine's displayed station report with the simulator's wind, pressure and visibility. Then check winds aloft after departure; matching surface weather alone does not prove the full forecast loaded.
Why does the simulator weather differ from the METAR?
A small mismatch does not necessarily mean the program is broken, because a METAR is a time-stamped observation from one point rather than a complete description of the surrounding atmosphere.
The engine may be blending two stations, smoothing a transition or combining the latest METAR with a forecast model for cloud coverage and upper winds. Simulator cloud systems also translate reported layers into their own visual model, so cloud bases and coverage will not always match literally.
- Old conditions: inspect the observation time and force a data refresh; the nearest station may not have issued a newer report.
- Weather repeatedly resets: another injector or the simulator's native live weather is probably still active.
- Correct pressure but no clouds: check that the engine is in injection mode rather than briefing-only mode.
- No connection: confirm the correct connector is installed and that security software is not blocking the weather program's network or local simulator connection.
- Abrupt redraws: increase transition or smoothing settings if that engine provides them, accepting that slower transitions can delay the arrival of newly reported weather.